GMC 2003 Sierra 1500 Pickup Owner's Manual page 402

How
to Add Fluid
3.
4.
Check both sides of the dipstick, and read the lower
level. The fluid level must be in the COLD area,
below the cross-hatched area, for a cold check or in
the HOT area or cross-hatched area for a hot
check.
If the fluid level
is
in the acceptable range, push the
dipstick back in all the way; then flip the handle
down to lock the dipstick in place.
Refer to the Maintenance Schedule to determine what
kind of transmission fluid to use. See Part D:
Recommended Fluids and Lubricants on page 6- 18.
Add fluid only after checking the transmission fluid while
it is hot. (A cold check is used only as a reference.) If
the fluid level is low, add only enough of the proper fluid
to bring the level up to the HOT area for a hot check.
It doesn't take much fluid, generally less than one
pint (0.5 L). Don't overfill.
Notice: We recommend you use only fluid labeled
DEXRON@ 111, because fluid with that label is
made especially
for
your automatic transmission.
Damage caused by fluid other than DEXRON@
111 is not covered by your new vehicle warranty.
After adding fluid, recheck the fluid level as
described under How
to
Check.
0
When the correct fluid level is obtained, push the
dipstick back in all the way; then flip the handle
down to lock the dipstick in place.
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